Re: How to force a 32-bit/64-bit universal app to start in 32-bit mode on Leopard?
Re: How to force a 32-bit/64-bit universal app to start in 32-bit mode on Leopard?
- Subject: Re: How to force a 32-bit/64-bit universal app to start in 32-bit mode on Leopard?
- From: Kevin Wojniak <email@hidden>
- Date: Thu, 8 Apr 2010 09:37:05 -0700
Not sure if it's needed, but you may need to run touch on the .app.
On Apr 8, 2010, at 8:59 AM, Oleg Krupnov wrote:
> No, I'm just double-clicking it in Finder.
>
> On Thu, Apr 8, 2010 at 8:57 AM, Kevin Wojniak <email@hidden> wrote:
>> Are you launching with NSTask or some other variant? If so it won't work. You need to use Launch Services instead. I think there are some low-level APIs to use to launch with a specific architecture, but if you can use LS it handles all the dirty work for you.
>>
>>
>> On Apr 8, 2010, at 8:53 AM, Oleg Krupnov wrote:
>>
>>> This would be a perfect solution, but I've found that on Leopard, this
>>> key seems to be ignored, the system still launches my app in 64-bit
>>> mode (via Finder).
>>>
>>> What may I be doing wrong?
>>>
>>> Thanks!
>>>
>>> On Thu, Apr 8, 2010 at 7:28 AM, Kevin Wojniak <email@hidden> wrote:
>>>> In your Info.plist add:
>>>>
>>>> <key>LSMinimumSystemVersionByArchitecture</key>
>>>> <dict>
>>>> <key>x86_64</key>
>>>> <string>10.6.0</string>
>>>> </dict>
>>>>
>>>>
>>>> Kevin
>>>>
>>>>
>>>> On Apr 8, 2010, at 7:21 AM, Oleg Krupnov wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> While it's good for my app to run in 64-bit mode on Snow Leopard, it
>>>>> turns out not desirable on Leopard, because of the delay of loading
>>>>> all 64-bit frameworks (in case if my app is the first 64-bit app
>>>>> launched after system boot). It literally makes me wait for about ten
>>>>> seconds, and the performance gain of my app in 64-bit mode is
>>>>> definitely not worth it on Leopard.
>>>>>
>>>>> My app is assembled as a universal binary that supports 3
>>>>> architectures: 32-bit intel, 32-bit ppc and 64-bit intel. Obviously,
>>>>> the system chooses the best architecture it can run, which is 64-bit
>>>>> intel in case of Leopard.
>>>>>
>>>>> Is there a way to change that and force my app to run in 32 bit mode on Leopard?
>>>>>
>>>>> I would hate to have to supply two versions, one for Leopard and
>>>>> another one for Snow Leopard.
>>>>>
>>>>> Thanks!
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>>
>>
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